Nearly 200 protesters were arrested on Saturday at Northeastern University, Arizona State University and Indiana University, according to officials, as colleges across the country struggle to quell growing pro-Palestinian demonstrations and encampments on campus.

More than 700 protesters have been arrested on U.S. campuses since April 18, when Columbia University had the New York Police Department clear a protest encampment there. In several cases, most of those who were arrested have been released.

At Northeastern in Boston, protesters had set up an encampment on the campus’s Centennial Common this week that drew more than 100 supporters. The administration had asked the protesters to leave, but many students did not.

Around dawn on Saturday, Massachusetts State Police officers arrived at the encampment and began to arrest protesters, putting them in zip-tie handcuffs and taking several tents down. They said they had arrested 102 protesters. It was unclear how many of those arrested were students, but the university said students who showed their university IDs were being released.

A Northeastern spokeswoman, Renata Nyul, said the demonstration had been “infiltrated by professional organizers” and that the “use of virulent antisemitic slurs, including ‘Kill the Jews,’ crossed the line.”